Organic light emitting device

Abstract

An organic light emitting device includes a base substrate defining an active area and a pad area that surrounds the active area, an organic light emitting layer formed on the active area, a first protective layer formed to cover the active area, where the organic light emitting layer is formed, and the pad area, a second protective layer formed to cover the first protective layer, and a dam formed between the first protective layer and the second protective layer, wherein the dam is located at a boundary between the active area and the pad area and includes a groove that is positioned separate from an outer portion of the active area.

What is claimed is: 
     
       1. An organic light emitting device, comprising:
 a base substrate defining an active area and a pad area that surrounds the active area; 
 an organic light emitting layer formed on the active area; 
 a first protective layer formed to cover the active area, where the organic light emitting layer is formed, and the pad area; 
 a second protective layer formed to cover the first protective layer, wherein the second protective layer is an organic layer; 
 a dam formed between the first protective layer and the second protective layer, 
 wherein the dam is located at a boundary between the active area and the pad area and includes a groove that is positioned separate from an outer portion of the active area, and 
 wherein the groove of the dam receives organic material; 
 a planarization layer on the base substrate; and 
 a bank on the planarization layer, 
 wherein the planarization layer and the bank are not formed at the dam. 
 
     
     
       2. The organic light emitting device according to  claim 1 , wherein the dam surrounds the active area. 
     
     
       3. The organic light emitting device according to  claim 1 , wherein the second protective layer is an organic layer and covers a foreign material occurring in a manufacturing process. 
     
     
       4. The organic light emitting device according to  claim 3 , wherein the second protective layer is planarly formed at the boundary. 
     
     
       5. The organic light emitting device according to  claim 1 , wherein the dam is separated from the outer portion of the active area by at least 100 μm. 
     
     
       6. The organic light emitting device according to  claim 5 , wherein the dam has a depth of at least 4 μm and a width of at least 50 μm.